20423340026 has 4 divisors (see below), whose sum is σ = 30635010042. Its totient is φ = 10211670012.

The previous prime is 20423340023. The next prime is 20423340053. The reversal of 20423340026 is 62004332402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16120111225 + 4303228801 = 126965^2 + 65599^2 .

It is a super-2 number, since 2×20423340026² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20423339977 and 20423340004.

It is not an unprimeable number, because it can be changed into a prime (20423340023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105835005 + ... + 5105835008.

Almost surely, 2^20423340026 is an apocalyptic number.

20423340026 is a deficient number, since it is larger than the sum of its proper divisors (10211670016).

20423340026 is a wasteful number, since it uses less digits than its factorization.

20423340026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10211670015.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 20423340026 its reverse (62004332402), we get a palindrome (82427672428).

The spelling of 20423340026 in words is "twenty billion, four hundred twenty-three million, three hundred forty thousand, twenty-six".